420 US customary teaspoons in imperial gallons
Result
The conversion result is: 420 US customary teaspoons is equivalent to 0.455368694718978 imperial gallons.[1]
Conversion formula
How to convert 420 US customary teaspoons to imperial gallons?
We know (by definition) that: 1 usteaspoon ≈ 0.00108421117790233 imperialgallon.
We can set up a proportion to solve for the number of imperial gallons.
1 usteaspoon / 420 usteaspoon ≈ 0.00108421117790233 imperialgallon / x imperialgallon
Now, we cross multiply to solve for our unknown x:
x imperialgallon ≈ (420 usteaspoon / 1 usteaspoon) * 0.00108421117790233 imperialgallon → x imperialgallon ≈ 0.4553686947189786 imperialgallon
Conclusion:
420 usteaspoon ≈ 0.4553686947189786 imperialgallon
Conversion in the opposite direction
The inverse of the conversion factor is that 1 imperial gallon is equal to 2.19602272092316 times 420 US customary teaspoons.
It can also be expressed as: 420 US customary teaspoons is equal to 1 / 2.19602272092316 imperial gallons.
Approximation
An approximate numerical result would be: four hundred and twenty US customary teaspoons is about zero point four six imperial gallons, or alternatively, a imperial gallon is about two point two zero times four hundred and twenty US customary teaspoons.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.